You can think of a significant digit as an "interesting" or an "important" digit that gives you useful information about a number. This means that any zeroes to the right of whole numbers or to the left of decimals can be discounted because they are placeholders. To find the number of significant digits in a number, just count the number of digits from left to right. Here are some examples:  1.239 has 4 significant digits 134.9 has 4 significant digits .0165 has 3 significant digits This depends on the problem you're working with. If you're rounding a number to two significant digits, for example, then you'll need to identify the second significant digit of the number and then use the number to the right of it to see if you should round it down or up. Here are some examples:  1.239 rounded to 3 significant digits is 1.24. This is because the digit to the right of the third digit, 3, is a 9, which is 5 or more. 134.9 rounded to 1 significant digit is 100. This is because the digit to the right of the digit in the hundreds place, or the first digit, 1, is 3, which is less than 5. 0.0165 rounded to 2 significant digits is 0.017. This is because the second significant digit is 6, and the number to the right of it, 5, makes it round up. To do this, you will first have to add up the numbers you are given. Then, you will have to find the number with the lowest amount of significant digits and then round your entire answer to that place. Here's how you do it:  13.214 + 234.6 + 7.0350 + 6.38 = 261.2290 See that the second number, 234.6, is only accurate to the tenths place, or four significant digits. Round the answer so that it is only accurate to the tenths place. 261.2290 becomes 261.2. First, multiply all of the numbers that you are given. Then, check them to see which number is rounded to the least amount of significant digits. Finally, round your finally answer to match the level of accuracy of that number. Here's how you do it:  16.235 × 0.217 × 5 = 17.614975 Notice that the 5 number only has one significant digit. This means that your final answer will only have one significant digit as well. 17.614975 rounded to one significant digit becomes 20.

Summary: Understand what a significant digit is. Round a number to an amount of significant digits. Round to the correct number of significant digits in addition. Round to the correct number of significant digits in multiplication.


If the site that you're trying to access is blocked specifically on your computer, you may be able to access it by using the website's mobile version, IP address, or Google Translate. In the event that you're unable to access websites that are blocked on your Internet connection, however, you'll need to use a VPN. VPNs can be difficult to install on monitored or controlled computers (e.g., library, school, or work machines); however, if you use a personal computer for work, you should be able to install the VPN while on your own wireless network. Many websites, such as Facebook and YouTube, have mobile alternatives that can be visited by typing "m." between the "www." section of the website's address and the website's name. Many blocking services do not account for the mobile versions of blocked sites. For example, you would access the mobile version of Facebook by going to "https://www.m.facebook.com/" in your browser. You can find a website's IP address, which is its raw numerical address, on any major computer platform, after which point you can enter the IP address into the browser's URL bar the same way that you'd search for a regular address (e.g., "https://www.google.com/").  This won't work for all websites; some services hide their IP addresses, and others use multiple IP addresses which aren't always reliable. If you don't have access to Command Prompt (Windows) or Terminal (Mac) on the computer on which sites are blocked, you can use a personal computer on an unrestricted network to find the IP address and then just use the address on your restricted computer. This method doesn't always work, but it provides a simple alternative to using a proxy site or a portable browser:  Go to https://translate.google.com/ in your browser. Type your website's address into the left text box. Select any language other than the website's original language for the right-most box. Click the website's link in the right-most box. Click the "Go to [Website]" link on the left side of the page if the website doesn't immediately load. Click the Translate option if prompted. Browse your site. The Wayback Machine site allows you to browse past versions of websites without actually going to the site in question. This won't help if you're attempting to check your Facebook feed, but you can use the Wayback Machine to view blocked research resources and the like.  Go to https://archive.org/web/ in your computer's browser. Enter a website's address into the text field that's near the top of the page. Click BROWSE HISTORY  Select a calendar day. Review the results. on a personal computer. Virtual Private Networks (VPNs) are always-on subscription services that route your Internet traffic through several different servers in different countries or locations. This effectively hides your Internet activity from anyone monitoring it, which likewise allows you to view sites and use services which are usually blocked in your area.  Most VPNs require a paid subscription, though some VPNs—such as Hotspot Shield—have a free version. In order for your VPN to remain undetected, it must be on the entire time that you're online.

Summary: Understand when these tricks will work. Try using the website's mobile version. Search for the website's IP address instead of its usual address. Use Google Translate to hide the website's address. Use Wayback Machine to browse archived pages. Use a VPN


Feel free to go on any site you want, like Facebook or Twitter.


Summary: Go to the Wii Shop Channel and download the Internet Channel, which is free. Select "Internet Channel" from the block on the main screen and follow the instructions to browse the Internet.